The best times to visit Bay Area for ideal weather are

April 16th to November 4th

based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.

 

 


Other Bay Area Travel Info

Weather in Bay Area

Temperature

Average temperatures in Bay Area vary somewhat. Considering humidity, temperatures feel nice most of the year, excluding some cold weeks in the winter, with a very low chance of rain or snow throughout the year. The area is more temperate than most — in the 63rd percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Bay Area, the hottest months are September, August, and then July. See average monthly temperatures below. The warmest time of year is generally late August to early September where highs are regularly around 78.1°F (25.6°C) with temperatures rarely dropping below 57.5°F (14.2°C) at night.

Bay Area Temperatures (Fahrenheit)

Key
High
Average
Low

Bay Area Temperatures (Celsius)

Key
High
Average
Low

“Feels-Like” Temperatures

The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.

Bay Area Perceived Temperature (F)

Key
High
Average
Low

Bay Area Perceived Temperature (C)

Key
High
Average
Low

 

Average Bay Area Temperatures by Month

Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.

Show Fahrenheit

MonthAvg. High (°F)Avg. Mean (°F)Avg. Low (°F)
Jan59.149.340.6
Feb6152.144.2
Mar64.854.746.7
Apr66.856.348.4
May68.558.551.4
Jun71.961.253.7
Jul72.162.456.4
Aug736356.7
Sep75.963.955.7
Oct73.361.652.5
Nov65.555.546.4
Dec58.249.842

Show Celsius

MonthAvg. High (°C)Avg. Mean (°C)Avg. Low (°C)
Jan15.19.64.8
Feb16.111.26.8
Mar18.212.68.2
Apr19.313.59.1
May20.314.710.8
Jun22.216.212.1
Jul22.316.913.6
Aug22.817.213.7
Sep24.417.713.2
Oct22.916.411.4
Nov18.613.18
Dec14.69.95.6

 


 

Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Bay Area are July, August, and then September. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around mid June. For example, on the week of June 18th there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in mid December with an average of 2 days of significant precipitation the week of December 17th.

When can you find snow in Bay Area? Weather stations report no annual snow. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.

Chance of Precipitation

The graph below shows the % chance of rainy and snowy days in Bay Area.

Key
Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Bay Area (in).

Key
Snow depth

Average Rain and Snow by Month

Show Inches

MonthDaily Chance of RainAverage Snow Depth (in)Total Precipitation (in)
Jan14%01.7
Feb23%02.8
Mar15%02.1
Apr13%01.5
May4%00.3
Jun3%00.3
Jul0%00
Aug0%00
Sep2%00.2
Oct6%01
Nov15%01.7
Dec22%03.9

Show Centimeters

MonthDaily Chance of RainAverage Snow Depth (cm)Total Precipitation (cm)
Jan1404.3
Feb2307.1
Mar1505.3
Apr1303.8
May400.8
Jun300.8
Jul000
Aug000
Sep200.5
Oct602.5
Nov1504.3
Dec2209.9

 

Humidity and Wind

Bay Area has some high humidity months, with other comfortably humid months. The least humid month is April (59.9% relative humidity), and the most humid month is August (69.3%).

Wind in Bay Area is usually calm. The windiest month is May, followed by July and April. May’s average wind speed of around 8.8 knots (10.2 MPH or 16.4 KPH) is considered “a gentle breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in early to mid April where average top sustained speeds reach 18 knots, which is considered a fresh breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in Bay Area.

Key
Avg. Relative Humidity

Wind

The graph below shows wind speed (max and average) in knots.

Key
Max Sustained Wind
Average Daily Wind

Average Wind Speeds

Show Wind Speeds

All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.

MonthAvg. WindAvg. Wind FeelSustained High WindHigh Wind Feel
Jan4.6Light breeze10.9Gentle breeze
Feb6.2Light breeze13.5Significant breeze
Mar7.1Gentle breeze15Gentle breeze
Apr8.4Gentle breeze17.3Strong breeze
May8.8Gentle breeze16.6Gentle breeze
Jun8.3Gentle breeze16.2Significant breeze
Jul8.5Gentle breeze15.6Gentle breeze
Aug7.8Gentle breeze15.1Significant breeze
Sep6.8Light breeze14.3Gentle breeze
Oct5.7Light breeze13Significant breeze
Nov4.8Light breeze11.5Gentle breeze
Dec5.3Light breeze11.9Significant breeze

Show Relative Humidity by Month

MonthAvg. Relative Humidity
Jan66.6%
Feb68.5%
Mar64.4%
Apr59.9%
May62.1%
Jun64.2%
Jul68.7%
Aug69.3%
Sep65%
Oct61.6%
Nov62.8%
Dec66.4%

 

Is it Safe to Travel to Bay Area?

Our best data indicates this area is generally safe. As of Oct 07, 2019 there are no travel advisories or warnings for the United States; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Sep 23, 2019.


 

The Busiest and Least Crowded Months

The busiest month for tourism in Bay Area, CA, US is July, followed by June and December. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Bay Area in November. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month

 

Most Popular Months to Visit

Key
Tourists Seeking Accommodations

Tourism graph is based on Google searches for services used by tourists relative to the rest of the year. Tourism data for this area is very reliable. Displayed data is calculated relative to the peak, so a score of 50.8 in November means 50.8% of the tourists vs. July.

 

 

Overall Bay Area Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderate. Highs range from 71.4°F (21.9°C) and 61.9°F (16.6°C) with warmer temperatures in the later months. Rain is rare with 1 to 5 days of significant precipitation per month. Spring is the slowest for tourism, which makes it a good time for those looking for deals.

Summer (June through August)

The middle-year months have comfortably cool weather with high temperatures that are comfortable. These months see the least precipitation with 0 to 1 days of precipitation per month. June – August is the busiest season for tourism in Bay Area, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 77.3°F (25.2°C) and 62.1°F (16.7°C), which will feel comfortable given the humidity and wind. It rains or snows a normal amount: 1 to 4 days per month. Tourism is fairly slow during these months due to the weather, so hotels may be lower priced.

Winter (December through February)

Weather is too cold this time of year in Bay Area to be enjoyable for warm weather travelers. The average high during this season is between 62.1°F (16.7°C) and 56.8°F (13.8°C). On average, it rains or snows a fair amount: 4 to 7 times per month. These times of year are the second busiest with tourists.

 

Best Times to Travelthe United States › Bay Area, CA, US